EX-CELL-O Milling Machine - Lathes.co.uk. The XLO ram-turret milling machine Model 602 was built in Canada by the Ex-Cell-O Corporation of 120 Weston Street, London, Ontario; Excello were, at one time, a major manufacturer of machine tools and produced many specialist and advanced machines including horizontal double-spindle boring machines, form, thread and tool grinders, profiling machines ...